Extended Reach Cryogenic Machining

The head uses a special pressure foot to sense part location, while laser sensors in the head measure the distance to the work surface and the normality of the approach angle. This real-time mold line sensing system ensures drilling is perpendicular to the skin.

The boring mill chassis, with its heavily ribbed cast iron column and stiff guideway system, provides high rigidity and vibration damping for exceptional stability while machining at high speeds. The traveling-column design has an X-Y-Z work range of 12 x 3 x 1.4 m (472 x 118 x 55 in), with X-Y repeatability of 0.0076 mm (0.0003 in) and Z-axis repeatability of 0.020 mm (0.0008 in).

A feed rate of 20,000 mm/min (787 ipm) for X and Y axes allows rapid and efficient machining of large components. An electrically-preloaded rack-and-pinion system drives the X axis with high accuracy, while the Y axis is driven with twin ballscrews. Precision roller packs on X, Y and Z axes provide stability, low friction, durability and maintainability.

The cast steel ram carrying the machining head utilizes hydraulic tension-rod displacement compensation to maintain tool point accuracy over its full 1.4 m (55 in) extension. The gimbal machining head is integrated with the ram and provides ±200 deg of C-axis rotation and ±90 deg of A-axis tilt. High-performance torque motors on the A and C axes allow positioning rates up to 60 deg/sec (10 rpm). A W-axis drilling quill provides 100 mm (3.98 in) feed stroke perpendicular to the Z-axis for precision drilling.

A column-mounted double-arm tool changer and 30-pocket drum-type tool magazine travel with the column to maximize in-cut time. Additional efficiency enhancements include Renishaw TS27R toolsetting probe and RMP 600 strain-gage spindle probe. The operator platform that travels with the column includes a 482 mm (19 in) flat panel monitor for visual observation of the work zone.

The modular FTR AutoDrill is available in a variety of sizes and can accommodate many tool-types and sizes – both fixed and rotating. In addition to cryogenic tool cooling, the AutoDrill can be configured for dry machining or with standard liquid coolant or MQL (Minimum Quantity Lubrication). The machines can be arranged for single or multi-station production and can easily be incorporated into flexible manufacturing cells. This is MAG’s newest configuration for processing large, high-value aerostructures.

Olympic Corporate Center l 3940 Olympic Boulevard, Suite 500 Erlanger, KY 41018, USA Phone: +1 859 534 4600 Fax: +1 859 669 1897, www.mag-ias.com.